Grinding-mill



(No Model.)

L. M. NETTLETON.

GRINDING MILL.

No. 418,623. Patented Dec. 81, 1889.

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UNITED STATES PATENT FFICE.

LUTHER M. NETTLETON, OF, BURLINGTON COLORADO.

GRINDING-MILL;

SPECIFICATION forming part of Letters Patent No. 418,623, dated December31, 1889.

Application filed October 10, 1889- Serial No.326,542. (No model.)

To all whom it may concern.-

Be it known that I, LUTHER M. N ETTLETON, a citizen of the United Statesof America, residing at Burlingtomin the county of Kit Carson and Stateof Colorado, have invented certain new and useful Improvements inGrinding-Mills; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

My invention has reference to grindingmills; and it consist-s in theimproved construction, hereinafter described and set forth, whereby anefficient arrangement is provided that will readily grind grain forfeed, and is specially adapted to be operated from awindmill.

In the accompanying drawings, form in g part of this specification,Figure 1 is a side view of a grinding-mill embodying my improvements,the side plate being removed. Fig. 2 is an end View showing theperipheral dress of the'cylinder. Fig. 3 is a detail View of one of theplates, showing its relative reductionsurface. Fig. .4 is a sectionaldetail view taken longitudinally through one of the reduction-plates andin the plane of one of the series of channels therein.

The main or containing case consists of side plates A, of the generalform shown by the outline in Fig. 2, and ,end plates B, bent or curvedto coincide with the outline of the side plates: At the top the case hasthe hopper a and at the bottom the discharge 1). A shaft 6 transverselypierces the casing, so that it bears in the sides thereof, and mountedupon the shaft, so as to revolve therewith, is a drum orreduction-cylinder C. By reference to Fig. 2 itwill be noted that theperiphery of this cylinder is furnished with a pcculiar dress,consisting of a series of diagonally-arranged grooves or channels 1 2 intwo series, which intersect each other at a point represented by acentral line 3 on the periphery of the cylinder. Each series of groovesor channels 1 2 extends in both directions. Commencing at a pointrepresented by a line 4, the grooves or channels continue, but becomegradually of reduced length, until they finally converge to a point. Thegrooves or channels 1 2 aforesaid are formed in the surface of theperiphery, so that they are below the level of the marginal portionsthereof, and the grooves grow shallower as they increase in length. Ineach of the lower offset recesses of the casing is located areduction-plate D, which is curved concentric with the curvature of thecylinder and has its inner face provided with a dress similar to that ofthe cylinder. The direction in which the dress extends is in a directionopposite to that of the portion of the cylinder-dress adjacent. The endof the shaft e is provided with an arm d, having a slot d, enabling anadjustable connection by means of a wristpin of a pitman extending froma windmill. The plates D are each seated upon an adj usting-boltf,extending through the end plate of the casing and enabling its relativead j ustment with reference to the cylinder.

In operation the grainis drawn in by the cylinder, the coarse dress ofwhich serves to bite and crack the coarser particles thereof.

The increasing length and decreasing depth of the grooves 1 2 serve tocause the grain to spread itself as it travels around within themachine, and also secure the reduction of the'finer particles. As willbe well understood, the cylinder does not revole, but oscillates, sothat the series of channels 1 2 in each direction are alternatelybrought into play. i

It will be'obvious that the machine is simple and effective in operationand readily accessible for cleaning and repair.

A suitable arrangement of valves or cutoffs may be used.

I claim 1. The combination, with the casing and shaft mounted thereon,of a reduction-cylinder mounted on said shaft and provided peripherallywith a series of diagonal channels 9 1 2, decreasing in width from oneside of the cylinder to the other, substantially as set forth.

2. The combination, with the casing and shaft mounted therein, ofareduction-cylinder mounted on said shaft and provided peripherally witha series of diagonal channels 1 2, of decreasing Width and increasingdepth, substantially as set forth.

3. The combination, with the inclosing-case and shaft mounted therein,of a cylinder pro vided with a peripheral dress comprising diagonalchannels extending in opposite directions and of decreasing width andincreasing depth in both directions, and reduction-plates 10 D D,located in opposite sides of said casing, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

LUTHER M. NETTLETON. Witnesses.

H. E. METTEY, W. S. TORBERT.

